diff --git a/src/Mod/Sketcher/Gui/EditModeConstraintCoinManager.cpp b/src/Mod/Sketcher/Gui/EditModeConstraintCoinManager.cpp
index f3252c676d..69d4f77814 100644
--- a/src/Mod/Sketcher/Gui/EditModeConstraintCoinManager.cpp
+++ b/src/Mod/Sketcher/Gui/EditModeConstraintCoinManager.cpp
@@ -1208,6 +1208,11 @@ Base::Vector3d EditModeConstraintCoinManager::seekConstraintPosition(const Base:
         relPos = norm * 0.5f + dir * multiplier;
         freePos = origPos + relPos * scaled_step;
 
+        // Prevent crash : https://forum.freecadweb.org/viewtopic.php?f=8&t=65305
+        if (!rp) {
+            return relPos * step;
+        }
+
         rp->setRadius(0.1f);
         rp->setPickAll(true);
         rp->setRay(SbVec3f(freePos.x, freePos.y, -1.f), SbVec3f(0, 0, 1) );